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http://www.certschief.comCertification Preparation Material



Lync Network Readiness Assessment

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Question: 1

You prepare to deliver a network assessment for a customer. The customer has four sites as described in the

following table:

The results of the traffic simulation for Seattle to Hong Kong are shown in the following table:

You need to analyze the data and provide the General Comments for the traffic simulation results. What should you


A. The average delay is beyond acceptable levels. Users might experience poor call quality.

B. The network performance tests indicate the link is ready for voice.

C. The packet loss is above 0.5%. Audio quality will be greatly reduced.

D. The percentage of WAN BW for RTC Traffic is greater than 100%, and users will experience poor calls due to

limited bandwidth.

Answer: A

Question: 2

Woodgrove Bank plans to implement Lync 2013 for all voice and video enterprise communications. The bank\'s

network topology is shown in the exhibit. (Click the Exhibit button.)

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The bank wants to design a Lync Server traffic simulation before the production implementation. You need to

determine the locations to test the Lync Server traffic simulation. Which locations should you test?


Main office in Boston

Data centers in New York, Prague, and Beijing

One branch in North America

One branch in Europe

One branch in Asia


Main office in Boston

Data center in New York

All sites that have connectivity issues


Main office in Boston

Data centers in New York, Prague, and Beijing

Two branches in North America

One branch in Europe

Three branches in Asia


Main office in Boston

Data centers in New York, Prague, and Beijing

Ten branches in North America

Five branches in Europe

Ten branches in Asia

Answer: C

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Question: 3

Fourth Coffee has deployed a Lync 2013 infrastructure. Company employees and guests joining from outside of the

company do not report any issues with shared media. The company reports, however, that visiting consultants

experience poor audio quality when they conduct peer-to-peer (P2P) audio sessions with Fourth Coffee employees

who are located in the same office. A section of the call data report (CDR) in represented in the following table:

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You need to identify the root cause of poor audio quality. Which value should you choose?

A. Applied bandwidth limit: 81 Kbps

B. Lower burst gap duration

C. Avg. round trip: 434 ms

D. Callee IP:

Answer: D

Question: 4

Northwind Traders has a Lync 2013 deployment. The company has outsourced the help desk to a third-party service

provider that is located in New Delhi. The service provider has a 10-MB site-to-site virtual private network (VPN)

connection to Northwind Traders. The service provider uses a proxy server to route and monitor traffic to Northwind

Traders. Both sites\' computers are on the 10.10.1.x/24 subnet. The proxy server\'s Northwind Traders-facing IP is

New Delhi users can access Northwind Traders\' Lync environment with [email protected], and they

are able to access conferences without issue. However, users complain that they are unable to share their desktops.

You need to recommend a solution. Which two actions should you recommend? (Each correct answer presents a

complete solution. Choose two.)

A. Add an Edge server at the New Delhi office.

B. Route Lync traffic externally by using the Edge server.

C. Disable all firewalls between Northwind Traders and New Delhi.

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D. Change IP scope and remove the proxy server.

Answer: AB

Question: 5

You perform a network readiness assessment for Lync deployment. The network includes a main office and 40

branch offices. The main office and 30 of the branch offices are located in North America and use a dedicated 20-

megabits per second (Mbps) Multiprotocol Label Switching (MPLS) link. The remaining 10 branch offices are located

in India and are connected to the main office by a virtual private network (VPN) site-to-site link. Each branch office

includes 100 clients and two multipurpose servers. Employees from the branch offices will use the Lync client for

peer-to-peer audio communications with employees at the main office. You need to identify the number of offices

required to test Lync readiness. What is the minimum number of offices you should include?

A. 2

B. 3

C. 40

D. 41

Answer: B

Question: 6

Your customer has a main office that houses 450 employees and a call center that houses 120 employees. The main

office and the call center are connected by a 100-megabits per second (Mbps) wide area network (WAN) link. The

call center uses a Private Branch Exchange (PBX) that has 150 incoming lines.

Your customer plans to deploy a Lync infrastructure for atl employees.

You collect network information and start building a Lync usage model.

You need to identify the deliverables that must be achieved after the Lync usage modeling phase is completed.

Which two deliverables should you achieve? (Each correct answer presents part of the solution. Choose two.)

A. Quality of Service (QoS) configuration

B. calculation of user-generated Lync traffic

C. calculation of server-to-server generated Lync traffic

D. calls simulation over the WAN link

E. RTC traffic estimation over the WAN link

Answer: AC

Question: 7

You perform a network readiness assessment for Lync deployment. The organization\'s network includes a head

office and 400 branch offices. All branch offices are connected to the head office with a Multiprotocol Label

Switching (MPLS) link. You have completed the traffic simulation. The Usage Modeling Data for the Beijing site is

shown in the following table:

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A summary of the simulation results is shown in the table below:

Detailed simulation results are shown in the following exhibits:

• One Way Network Delay {Click the Exhibit button.)

• Average Jitter (Click the Exhibit button.)

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• Maximum Jitter (Click the Exhibit button.)

• Average Packet Loss (Click the Exhibit button.)

• Maximum Consecutive Loss (Click the Exhibit button.)

You need to provide recommendations based on the simulation results. What should you recommend?

A. Implement Call Admission Control (CAC) on Lync for the affected sites.

B. Restrict video capability or reduce quality codec usage for certain user groups.

C. Increase WAN link bandwidth.

D. Monitor Quality of Experience (QoE).

Answer: C

Question: 8

Your company corporate telephony environment is a combination of Lync 2013 and traditional Private Branch

Exchange (PBX). The company has 3,500 users at three sites that use a Multiprotocol Label Switching (MPLS)

topology. On average, the company has 3 percent of its users dialing in for conferences and 7 percent on a public

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switched telephone network (PSTN) call at any time. The company plans to remove the PBXs and have all users use

only Lync 2013. The company also plans to migrate from an existing content sharing platform. You need to generate

a persona by using IP-based unified communication (UC) scenarios. Which three pieces of information should you

collect when you are defining a persona for the existing communications? (Each correct answer presents part of the

solution. Choose three.)

A. conference sessions

B. voice codec used

C. PSTN-to-PSTN sessions

D. peer-to-peer (P2P) sessions

E. content sharing

Answer: BDE

Question: 9

Your customer\'s network includes four offices and a data center that are connected by a Multiprotocol Label

Switching (MPLS) network. Your customer has performed a network readiness assessment. The readiness report

includes the following sections:

Existing network topology

Historical wide area network (WAN) links bandwidth utilization

Bandwidth estimations


Video bitrates per client window sizes


Desktop sharing bitrates


Bitrates per codec

Users and locations

You are asked to review the readiness report. You need to identify which sections are missing from the readiness

report and should be included.

Which two sections should you include? (Each correct answer presents part of the solution. Choose two.)

A. Discovery

B. Recommendations

C. Traffic Simulation

D. Modeling

Answer: BD

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